21458840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1423}}^1$

素因数の和:1476

約数の個数: 64

約数和(自身を含む): 53827200

約数和(自身を除く): 32368360

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 29, 40, 52, 58, 65, 104, 116, 130, 145, 232, 260, 290, 377, 520, 580, 754, 1160, 1423, 1508, 1885, 2846, 3016, 3770, 5692, 7115, 7540, 11384, 14230, 15080, 18499, 28460, 36998, 41267, 56920, 73996, 82534, 92495, 147992, 165068, 184990, 206335, 330136, 369980, 412670, 536471, 739960, 825340, 1072942, 1650680, 2145884, 2682355, 4291768, 5364710, 10729420, 21458840]

約数ペア:

[(1, 21458840), (2, 10729420), (4, 5364710), (5, 4291768), (8, 2682355), (10, 2145884), (13, 1650680), (20, 1072942), (26, 825340), (29, 739960), (40, 536471), (52, 412670), (58, 369980), (65, 330136), (104, 206335), (116, 184990), (130, 165068), (145, 147992), (232, 92495), (260, 82534), (290, 73996), (377, 56920), (520, 41267), (580, 36998), (754, 28460), (1160, 18499), (1423, 15080), (1508, 14230), (1885, 11384), (2846, 7540), (3016, 7115), (3770, 5692)]